Add DEPS and minimal build configuration for Capstone disassembler.

.gitignore

 # Copyright 2012 Google Inc. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
 # You may obtain a copy of the License at
 #
 #     http://www.apache.org/licenses/LICENSE-2.0
 #
 # Unless required by applicable law or agreed to in writing, software
 # distributed under the License is distributed on an "AS IS" BASIS,
@@ skipping 51 matching lines @@
 /out/
 
 # Ignore directories gclient/gitdeps sync.
 /base/
 /build/
 /buildtools/
 /syzygy/binaries
 /syzygy/internal
 /testing/
 /third_party/coverage_analyzer/
+/third_party/capstone/files
 /third_party/crashpad/
 /third_party/distorm/files
 /third_party/dromaeo/files
 /third_party/icu/
 /third_party/libxml/
 /third_party/microsoft-pdb/
 /third_party/modp_b64/
 /third_party/platformsdk_win7/
 /third_party/protobuf/src/
 /third_party/python_26/
 /third_party/sawbuck/py/
 /third_party/vsssdk72/
 /third_party/zlib/
 /tools/
 
 # Ignore SVN metadata.
 .svn/
 
 # Ignore Python build artifacts
 *.egg-info/
 
 # Ignore developer specific GYP configuration.
 syzygy.gyp_env
 
 # Ignore the landmines file.
 .landmines